In a closed ecosystem, monitoring the amount of carbon in the various spheres would show
which of the following changes as a result of continued photosynthesis?

The change in a coefficient of linkage disequilibrium

(D) equal to -0.204 expected to be if the recombination rate is 0.001  is 0.2041.

The formula for the calculation of D is:

D = pAB - pApB, where:

pAB is the frequency of a haplotype containing alleles A and B, pApB is the expected frequency of a haplotype consisting of the frequencies of A and B alleles based on their individual frequencies. The formula for calculating the expected change in D with a recombination rate of r is:

∆D = -rDIn this question,

the value of D = -0.204 and the recombination rate(r) = 0.001.

We can substitute these values into the above equation to obtain the change in D as follows:

∆D = -rD∆D = -0.001 (-0.204)∆D = 0.000204

Hence, the change in D is expected to be 0.2041 (rounded off to four decimal places).

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Answer:

B. Providing the building instructions for living things

Explanation:

The function of protein macromolecules is that they provide the building instructions for living organims.

Proteins are also polypetides.

Trichomonas vaginalis is a protist that causes an STD. Trichomonas vaginalis is a motile, single-celled, parasitic organism that causes trichomoniasis, an STD in females. In males, it can cause urethritis and prostatitis. Trichomonas vaginalis is typically found in the vagina and urethra of infected individuals.

It spreads via sexual contact and can be asymptomatic. Symptoms include vaginal discharge, burning, itching, and painful urination. Trichomonas vaginalis is usually treated with antiprotozoal medications such as metronidazole. Sexual partners of infected individuals should be treated as well to prevent reinfection. Trichomonas vaginalis is a sexually transmitted disease (STD) caused by a parasitic protist called Trichomonas vaginalis.

It's passed through sexual contact and is one of the most common sexually transmitted infections. Trichomonas vaginalis infection may be asymptomatic in up to 50% of people. Women may experience a frothy, greenish-yellow, fishy-smelling vaginal discharge and vulvar itching or burning. Men may experience urethral discharge or burning during urination. The presence of Trichomonas vaginalis may increase the risk of acquiring other sexually transmitted infections (STIs) or HIV.

There is no immunity against trichomoniasis, and infection does not provide protection against future infections. Hence, it is essential to use protective measures like condoms during intercourse.

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Answer:

b. Two oppositely-charged ions

Explanation:

opposites attract when talking about ions

Here are the 3 parts of the cell theory:

1. Cells are the basic building blocks of any living things.

2. Any living thing is composed of more than 2 cells.

3. New cella arise from the old

Answer:

1) All living organisms are composed of one or more cells.

2) The cell is the basic unit of structure and function in living organisms.  

3) All cells come from preexisting cells.

Explanation:

These are the three most important statements to know. These are also the three parts of the cell theory.

Hope this helps!

Answer:

Cell Membrane---Semi-permeable

Explanation:

All cells have cell membranes, regardless of the type, and they are all semi-permeable, or selectively permeable, which means they can regulate what enters and leaves the cell.

Answer:

heavier elements are formed

Explanation:

Remember, when a series of processes (fusion of elements) occurs in a star, it would result in a huge explosion that leads to the death of the star, forming what is called a supernova.

The supernova then forms heavier elements that are released into space as a result of the extreme heat and turmoil.

Answer:

The answer is T

Explanation:

In RNA, however, a base called uracil (U) replaces thymine (T) as the complementary nucleotide to adenine

1. Dead plants, animal carcasses, compost.

2. You would find plenty of dead leaves and bones on the forest floor, while the desert floor would be very low in organic matter and would contain a higher majority of sand.

3. Organic matter is generally darker when referring to color. This is why the humus layer, or the final stage in the decomposition of organic waste, is black.

4. The soil texture triangle is used to help visualize and understand the meaning behind soil texture names. It tells us specifically what textures soils may be depending on the percentage of sand, silt, and clay in each.

5. The numbers on the side of the triangle relate to the percentage of clay, silt, and sand in the soil.

6. Soil compaction can prevent water drainage, slow microorganism population growth, and suffocate and stunt plants. Air can be brought back to the soil by using an aeration tool, or by introducing burrowing animals and plants with heavy roots. Aeration tools reduce compaction in soil, while rooted plants and burrowing animals create pores that allow air and water to drain into it.

7. (I can't 100% answer this question because it is apart of the reading that I don't have access to but I'll give it a shot) A soil profile is the arrangement of soil horizons that make up the various layers in the soil. We observe and describe soil horizons and soil profiles to help classify and interpret the type and uses of soils.

Explanation:

i think they obtain food in order to get the energy they need to carry out life functions

Ameoba is single-celled organisms that need to obtain food in order to get the energy they need to carry out.

Through the procedure of phagocytosis ( which means cell-eating), which is a type of endocytosis, an Amoeba obtains its food.

Its cell membrane is pliable enough, food particles are consumed forming a food vacuole encircling it which is helped by the pseudopodia.

It secretes digestive enzymes to bring about digestion of the swallowed particle once the food is tangled.

Thus, Ameoba is a single-celled organism that needs to obtain food in order to get the energy they need to carry out.

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Answer:

humidity

Explanation:

Only older rock contain the fossils of complex life forms is true of the rock layers. Thus option A is correct.

The formation of rock occurs when different mineral constituents are deposited and aggregated in the  earth’s crust, it can be up different types  based on  Geological classification, Physical classification, Chemical classification.

According to Geological classification it can be Sedimentary rock means it is  formed by the deposition of sediments by the weathering process of pre-existing rocks and carried out by various agents like water, wind, frost, gravity.

Igneous rocks formed  by solidification of magma below the earth’s crust, it is held  below the earth’s surface, when these magma cools down  and solidifies into igneous rocks.

Metamorphic rocks formed  by the process of metamorphism where the changes in  the characteristics of the pre-existing rocks caused by heat and pressure, for example Slate, Gneiss, Schist, marble, soapstone etc.

Thus option A is correct.

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Since we cannot have a fraction of a plant, we would need to examine at least 7 offspring plants to achieve this level of confidence.

To determine the number of offspring plants that need to be examined to be confident at the 1% level that the r plant is actually rr, we can use a statistical test called a chi-square test. This test compares the observed data with the expected data based on the assumption of a specific genetic ratio.

In this case, we are crossing plants with genotypes r (round) and rr (wrinkled). The expected genetic ratio for this cross is 1:1 if the r plant is actually rr. We want to be confident at the 1% level, which means that there is only a 1% chance of observing a deviation from the expected ratio due to random chance.

To determine the sample size needed, we can perform a chi-square test with a significance level of 0.01 (1%). The chi-square test will provide a critical value that indicates the maximum allowable deviation from the expected ratio.

The formula to calculate the critical chi-square value is:

χ²_critical = χ²_(α, df)

where α is the significance level (0.01) and df is the degrees of freedom, which is equal to the number of categories minus 1.

In this case, there are 2 categories (r and rr), so df = 2 - 1 = 1.

Using a chi-square table or a statistical software, we can find that the critical chi-square value at α = 0.01 with 1 degree of freedom is approximately 6.635.

Once we have the critical chi-square value, we can use it to calculate the required sample size using the formula:

n = (χ²_critical * (p1 * p2)) / ((p1 - p2)²)

where p1 and p2 are the expected proportions for each category. In this case, since we expect a 1:1 ratio, p1 = p2 = 0.5.

Plugging in the values, we have:

n = (6.635 * (0.5 * 0.5)) / ((0.5 - 0.5)²) = (6.635 * 0.25) / (0.25) = 6.635

Therefore, the number of offspring plants that need to be examined to be confident at the 1% level that the r plant is actually rr is approximately 6.635. Since we cannot have a fraction of a plant, we would need to examine at least 7 offspring plants to achieve this level of confidence.

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Double fertilization is a process that occurs in angiosperms (flowering plants) during the fertilization of the ovule. In this process, two fertilizations occur in which one sperm cell fuses with the egg cell to form the zygote while the other sperm cell fuses with the polar nuclei to form the triploid endosperm.

This process is essential for the development of angiosperm seeds and fruits. However, one of the given statements regarding double fertilization in angiosperms would lose points on an exam, which is d) the megasporangium gives rise to four haploid eggs through meiosis. In angiosperms, the megasporangium, also known as the ovule, gives rise to the female gametophyte which contains only one egg cell.

During the process of megasporogenesis, meiosis occurs which produces four haploid megaspores. Out of these four megaspores, only one survives and develops into the mature female gametophyte. Therefore, the statement d) the megasporangium gives rise to four haploid eggs through meiosis is false, and it would lose points on an exam.The correct statement is e) one of the pollen nuclei contributes to the genome of the endosperm. During double fertilization, one of the two sperm nuclei fuses with the polar nuclei to form the triploid endosperm, while the other fuses with the egg to form the diploid zygote.

The angiosperm embryo is diploid, and the pollen tube reaching the micropyle results in the death of one of the synergids. The fertilized angiosperm ovule consists of diploid and triploid cells. Therefore, the correct statement is e) one of the pollen nuclei contributes to the genome of the endosperm.

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Answer:

strong acid

Explanation:

i just got it right on edu 2020

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Carla is using a fertilizer that contains nitric acid, which is classified as strong acid. The correct option is A.

Strong acids dissociate completely or nearly completely in water, whereas weak acids dissociate only partially when dissolved in water.

An acid or base that conducts electricity strongly contains a large number of ions and is referred to as a strong acid or base, whereas an acid or base that conducts electricity only weakly contains only a few ions and is referred to as a weak acid or base.

When dissolved in water, an equilibrium between the concentrations of the weak acid and its constituent ions is established. The following are some common examples of weak acids.

Hydrochloric acid, nitric acid, sulfuric acid, hydrobromic acid, hydroiodic acid, perchloric acid, and chloric acid are examples of strong acids.

Thus, the correct option is A.

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Answer:

TRUE

Explanation:

Answer:

A) Gravity is the force that pulls objects toward Earth's center.

Explanation:

i took the quiz on ed.

Answer:

B. Gravity is the force that pulls objects toward Earth’s center.

Explanation:

The presence of oxygen is not required for the process of formation of coal.

Coal forms over millions of years through coalification, mainly from the remains of deceased organisms, notably dead vegetation, undergoing transformation into a fossil fuel with high carbon content.

Through the coalification process, the organic matter undergoes high pressure and heat, resulting in the formation of coal. In fact, The presence of oxygen is not required in coalification but it is the absence of oxygen that helps in preserving and transforming the organic matter into coal.

Therefore, the presence of oxygen is not required for the coal formation.

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Answer:

The answer to this question is C. It converts light energy to chemical energy.

Hope this helps!

Photosynthesis is the procedure that convert light energy into chemical energy. The correct option is C.

The operation by which green plants as well as certain life forms convert light energy into chemical energy is known as photosynthesis.

Light energy is captured and is used by green plants during photosynthesis to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Thus, the correct option is C.

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Answer:

lemonade and jam doughnut

Answer:

Explanation:

Diploid cells

Answer:

3 significant figures means simply that you only want to see 3 numbers. To make 3 numbers out of those 5 you got there, just round the 6 up and make the 8 turn to a 9.

therefore, the answer you want is 90,9

Answer:

B) eptiheral tissue

Explanation:

this is because they line many things in the body such as the organs and of course cells.

True or false: TNTC - too numerous to count is when the number of colonies on a plate is greater than 300?Answer: TrueWhen microbiologists work on microbial cultures, they analyze and evaluate them in different ways. The colony-forming units (CFU) are the most prevalent way to determine the number of bacteria in a sample.

Microbiologists grow bacterial samples on agar plates to separate and determine how many bacterial colonies they can create.Microbiologists use a Petri dish and appropriate culture media to culture microbial cells. A streak plate, a spread plate, or a pour plate is used to isolate and purify a colony of microorganisms.

Colony formation is caused by the multiplication of a single microbial cell. A single cell, called a colony-forming unit (CFU), produces one colony on a plate.Each of the colonies grown on the Petri dish contains millions of identical microbes. To determine how many bacteria are in the initial culture, microbiologists count the number of colonies. The CFU is the number of cells or bacteria in the initial culture, estimated by multiplying the number of colonies by the number of cells that form each colony.

When analyzing microbial cultures, if the colonies are so numerous that they cannot be counted, it is referred to as TNTC - too numerous to count. As a general rule, TNTC is defined as having more than 300 colonies on a plate. Thus, we can say that the given statement is true that TNTC - too numerous to count is when the number of colonies on a plate is greater than 300.

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The central xylem and phloem tissues in roots play a significant role in transporting water, nutrients, and sugars throughout the plant, respectively.

Xylem tissue is responsible for moving water and minerals from the roots to the rest of the plant, while phloem tissue transports sugars, amino acids, and other nutrients produced by the leaves throughout the plant.In a case where the central xylem and phloem tissues in the roots of a tree are destroyed by a fungus, the transport of water, minerals, and sugars would be hindered, leading to a loss of function of the root system. The plant would not be able to absorb essential nutrients and water from the soil effectively, leading to dehydration and malnutrition. This, in turn, could lead to a decrease in the rate of photosynthesis, growth, and reproduction.

Ultimately, the death of the plant would be inevitable if the damage is not corrected in time. The destruction of the central xylem and phloem tissues in roots by the fungus would have severe consequences on the plant's overall health and survival.

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The statement "people with fatal familial insomnia harbor the prion gene mutation in only the cells of the thalamus" is false. Fatal familial insomnia (FFI) is a genetic disease that is passed down through generations. It is caused by a mutation in the PRNP gene that is located on chromosome 20.

The PRNP gene provides instructions for making a protein called prion protein (PrP), which is found mainly in the brain. The mutation results in the production of a misfolded prion protein that causes the death of nerve cells in the brain. This damage is particularly pronounced in a part of the brain called the thalamus.

The thalamus is responsible for regulating sleep, which is why insomnia is a hallmark symptom of FFI. However, the prion protein is found in other cells besides the cells of the thalamus. This includes cells in the spleen and lymph nodes, as well as other parts of the brain. The misfolded prion protein can accumulate in these cells and lead to the development of other forms of prion disease, such as Creutzfeldt-Jakob disease.

Therefore, it is not accurate to say that the prion gene mutation is only found in the cells of the thalamus.

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Answer:

a-c- e are correct answer see table and refer clearly and like me